1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/*
* Sega System 24
*
*/
#include "emu.h"
#include "includes/segas24.h"
#include <algorithm>
#include <vector>
namespace {
struct layer_sort {
layer_sort(segas24_mixer_device &_mixer) : mixer(_mixer) { }
bool operator()(int l1, int l2) {
static const int default_pri[12] = { 0, 1, 2, 3, 4, 5, 6, 7, -4, -3, -2, -1 };
int p1 = mixer.get_reg(l1) & 7;
int p2 = mixer.get_reg(l2) & 7;
if(p1 != p2)
return p1 - p2 < 0;
return default_pri[l2] - default_pri[l1] < 0;
}
segas24_mixer_device &mixer;
};
}
uint32_t segas24_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if(m_vmixer->get_reg(13) & 1) {
bitmap.fill(m_palette->black_pen());
return 0;
}
screen.priority().fill(0);
bitmap.fill(0, cliprect);
std::vector<int> order;
order.resize(12);
for(int i=0; i<12; i++)
order[i] = i;
std::sort(order.begin(), order.end(), layer_sort(*m_vmixer));
int spri[4]{};
int level = 0;
for(int i=0; i<12; i++)
if(order[i] < 8)
m_vtile->draw(screen, bitmap, cliprect, order[i], level, 0);
else {
spri[order[i]-8] = level;
level++;
}
m_vsprite->draw(bitmap, cliprect, screen.priority(), spri);
return 0;
}
|